Work feed and product remover means for punching machine



March 19, 1963 MITSUJI HIROUMI ETAL 3,081,655

WORK FEED AND PRODUCT REMOVER MEANS FOR PUNCHING MACHINE Filed Sept. 11, 1959 5 Sheets-Sheet 1 IWE/vToRs MITsuJI HIROUMI Auo SHIMBEE Hzgoum BY MV/ WJZ Arm/v5 KS Mardl 9, 1963 MITSUJI HIROUMI ETAL 3,

WORK FEED AND PRODUCT REMOVER MEANS- FOR PUNCHING MACHINE Filed Sept. 11, 1959 5 Sheets-Sheet 2 Fig.3

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WORK FEED AND PRODUCT REMOVER MEANS FOR PUNCHING MACHINE 5 Sheets-Sheet 5 Filed Sept. 11, 1959 mum/runs HrrsuJI HIRouMI SHFHEEE HIROUMI r 3,081,655 WORK FEED AND PRODUCT REMOVER MEANS FOR PUNCHING MACHINE Mitsuji Hirourni and Shirnbee Hiroumi, both of 7 4-chome, Ohirakicho, Fuirushima-ku, Osaka City, Japan Filed Sept. 11, 1959, Ser. No. 839,372 3 Claims. (Cl. 83112) This invention relates to continuous punching machines.

In a known type of a punching machine wherein a material strip is first shorn into a number of narrower strips, which are then punched one after another in a puncher, much trouble and labor is needed for feeding the puncher with those strips in a steady succession and besides, those narrow strips necessarily yield much more scraps than broader ones and thus make the cost that much dearer. The object of the present invention is to provide means for feeding a puncher with a broad strip, not shorn into narrower ones, punching it without producing so many scraps and automatically carrying away the blanks.

With this object in view, the present invention provides a continuous punching machine which has a feed device for feeding a rolled broad strip, not shorn into narrower strips, automatically at certain intervals, a punching apparatus co-operating with the feed device, a conveyer belt for carrying away blanks, and a winder for rolling up scraps.

According to the present invention, since a rolled strip, not shorn into narrower strips, is being directly punched, the loss of material is much less and further, the strip, automatically fed at certain intervals, is punched by a number of punches and dies simultaneously, blanks are carried away by a conveyor belt,'and scraps are rolled up by a winder, all these parts being operated by a single agency, so that the whole process needs hardly any labor and is much more efficient than that of a known type.

Other and the further objects of the present invention will become apparent from the following specification and claims taken together with the accompanying drawings in which is shown the preferred embodiment of the continuous punching machine according to the present invention.

FIG. 1 is a side view of a continuous punching machine embodying the present invention.

FIG. 2 is a sectional elevation of the feeding part of a continuous punching machine according to the present invention.

FIG. 3 is a plan view of a part of FIG. 2.

'FIG. 4 is a perspective view of a part of FIG. 2.

FIGS. 5 and 6 are side views of FIG. 2 partly in section.

FIGS. 7 and S are enlarged sectional elevations of the punching part of the continuous punching machine according to the present invention.

FIG. 9 is a plan view of a part of a strip showing the manner in which the punching operation is carried out.

In FIG. 1, reference numeral 11 indicates a rolled strip mounted upon rollers 12 and 13, roller 13 being driven by an intermediate shaft 14 which co-operates with a main shaft 15 by means of a belt 16. To the surface of a strip 11 is applied lubricating oil or powder by a lubricant applying device 17 which the intermediate shaft 14 drives with a belt 18. The strip 11 is then fed to a punching part, hereinafter described, through feed rollers 19, a guide roller 20 and further feed rollers 19.

A bed 21 of a press 22 is inclined at a certain angle to the horizontal plane, and its frame 23 is provided with a pair of feed rollers 24 at its trout and rear portions respectively. An eccentric 25 installed on the frame 23 is driven by the main shaft 15 by means of a chain 26,

atent ice t and the eccentric sheave is connected to an oscillating .strip 11 lever 27 by an eccentric rod 28, and the upper end of the oscillating lever 27 is mounted on a shaft 29 of the lower feed roller 24. The upper feed roller 24 is suspended from a movable iron core 30 of an electromagnet 31, which a cam 32 fixed to the main shaft 15 operates through a micro-switch 33. When the lower teed roller 24 is turned in the feed direction by means of the eccentric 25, the upper feed roller 24, pushed down by a spring 34, presses the strip 11 down upon the lower feed roller 24 and the strip 11 proceeds in the feeding direction. When the lower feed roller 24 turns in the opposite direction, the upper feed roller 24 is drawn up by the electromagnet 31 and the strip 11 steps.

A slidable rod 35 is fitted in a rail 36' fixed on each side of the frame 23. A rod 37 fixed to the slidable rod 35 is connected to the eccentric sheave of an eccentric 38 mounted on the frame 23 by an eccentric rod 39 to give the slidable rod 35a reciprocating motion. The eccentric 38 is driven by the main shaft 15 through a chain 40. On the outer side of each slidable rod 35 are pivoted a plurality of gripping pieces 41 provided with an inside projection 42 and an outside projection 43, of which the latter is loosely fitted in a movable guide rail 44. When the slidable rod 35 moves in the feeding direction, the electromagnet 45, energized through the micro-switch 33, draws down the guide rail 44 so that each gripping piece 41 turns, and the inside projection 42 thereof presses the strip 11 down upon the slidable rod 35. When the slid- An annular die 47 and a supporter 48 are firmly fitted in each recess of a die holder 49 fixed upon the bed 21, and a movable inner die 50, inserted between the die 47 and the supporter 48, is pushed up to its upper position by a spring 51. Upon the bed 21 is also fixed a stripper .52 and a pressure plate 53. On a punch plate 54 fixed to the under surface of a slide ram 55 is fixed a number of annular punches 56, each of which has a movable inner punch 57 suspended by a rod 59 from a bar 58 pushed upwardly by a spring '60. The slide ram 55 is driven by the main shaft by means of an eccentric 61 fixed thereon. 62 indicates a knockout bar fixed to the frame 23. When the slide ram 55 descends (FIG. 7), the annular punches '56 are driven into the annular dies 47 thereby punching the strip 11 the inner annular dies 50 fitting inside the annular punches 56 bend the rims of the blanks downward, and the inner punches being driven inside the inner annular dies 50 give the blanks upward ridges at their circular bends. When the slide ram 55 ascends with the annular punches bearing the blanks, the bars 58 strike against the knockout rods and the blanks are dropped down (FIG. 7). The pressure plate 53 being inclined, although FIG. 7 shows it positioned horizontally by way of convenience, the dropped blanks slide down to a conveyor belt 63, which is installed on the pressure plate crosswise to it. On the pressure plate a stopper 64 is fixed along the lower edge of the conveyor belt 63. A winder 65, turned by rollers 66 and 67, rolls up the scrap.

PEG. 9 shows an example of an arrangement of the annular dies 47 -for eliicient and economical punching, in which they are arranged in zigzag formation and spaced at two pitches both in rank and file before the first conveyor belt 63, and between the first and the second conveyor belts they are spaced, in the same zigzag formation, between the ranks of holes punched by the dies 4'7 at one pitch before the first conveyor belt 63. Thus arranged, the annular dies 47 can be installed clear of the 3 conveyor belt 63, and the blanks never fall in the punching holes bored in the pressure plate 53.

It is thought that the invention and its advantages will be understood from the foregoing description and it is apparent that various changes may be made in the form, construction and arrangement of the parts Without departing from the spirit and scope of the invention or sacrificing its material advantages, the form hereinbefore described and illustrated in the drawings being merely a preferred embodiment thereof.

Having thus described our invention, What we claim and desire to secure by Letters Patent of the United States is:

l. A continuous punching machine, comprising punching means, a first feeding means mounted ahead of said punching means for feeding the sheet to be punched to said punching means, said first feeding means having a pair of opposed rollers, one roller being mounted in a fixed position immediately below the path of the sheet to be punched, driving means for said punching machine driving said punching means and having an eccentric therein, said eccentric being connected to said one roller for oscillating said one roller, the other roller being mounted for reciprocation toward and away from the one roller and being spring urged toward the one roller, an electromagnet acting on said other roller for moving the other roller away from the said one roller, a switch in the circuit for said electromagnet, cam means in said driving means for closing and opening said switch for energizing and deenergizing said electromagnet, said cam means closing said switch when said eccentric is oscillating said one roller in a direction opposite the feeding direction, said machine further comprising second feeding means adjacent said punching means for feeding the sheet to be punched through said punching means, said second feeding means comprising a plurality of sheet gripping members along each edge of the path of said sheet, electromagnet means acting on said sheet gripping members for moving them into engagement with the sheet and spring means urging them away from said sheet, said elecltromagnet means having an energizing circuit in which said switch is included, and said driving means driving said punching means while said electromagnet is deenergized and being connected to said sheet engaging means for reciprocating said sheet gripping members back and forth along the feed path simultaneously as said eccentric oscillates said one roller, and conveyor means for conveying away the portions of said sheet which are punched from the remainder of said sheet.

2. A punching machine as claimed in claim 1 in which said second feeding means comprises a pair of slide members extending in the direction of the path of the sheet to be punched and positioned laterally of said punching means with respect to said path, said sheet gripping members being pivotally and slidably positioned in said slide members, a pair of sliders, one along each side of the path of the sheet, each slider being connected to each of the sheet engaging members on the corresponding side of the path of the sheet, said driving means being connected to said sliders for reciprocating said sliders in a direction parallel to the path of the sheet, and said electromagnet means connected to said slide members for moving said slide members away from the path of the sheet for pivoting said sheet gripping members away from the path of the sheet.

3. A punching machine as claimed in claim 1 in which said punching means comprises cooperating punch means and die means on opposite sides of the path of said sheet, a pressure plate between said punch means and said die means and above the path of the sheet, said pressure plate being inclined to the horizontal in the direction of movement of the sheet through the machine and having apertures therein in register with the punch means and die means, and said conveying means extending across the lower end of said pressure plate in a direction transverse to the path of the sheet.

References Cited in the file of this patent UNITED STATES PATENTS 264,528 Hal-l Sept. 19, 1882 907,690 Harbeck Dec. 22, 1908 1,048,560 McCall Dec. 31, 1912 1,113,910" Rigby Oct. 13, 1914 1,503,829 Heald Aug. 5, 1924 2,338,596 Pitt et a1 Jan. 4, 1944 2,342,049 Holmbeck Feb. 15, 1944 2,722,276 Revelle Nov. 1, 1955 2,725,101 Von Hofe Nov. 29, 1955 2,857,966 Sarka Oct. 28, 1958 

1. A CONTINUOUS PUNCHING MACHINE, COMPRISING PUNCHING MEANS, A FIRST FEEDING MEANS MOUNTED AHEAD OF SAID PUNCHING MEANS FOR FEEDING THE SHEET TO BE PUNCHED TO SAID PUNCHING MEANS, SAID FIRST FEEDING MEANS HAVING A PAIR OF OPPOSED ROLLERS, ONE ROLLER BEING MOUNTED IN A FIXED POSITION IMMEDIATELY BELOW THE PATH OF THE SHEET TO BE PUNCHED, DRIVING MEANS FOR SAID PUNCHING MACHINE DRIVING SAID PUNCHING MEANS AND HAVING AN ECCENTRIC THEREIN, SAID ECCENTRIC BEING CONNECTED TO SAID ONE ROLLER FOR OSCILLATING SAID ONE ROLLER, THE OTHER ROLLER BEING MOUNTED FOR RECIPROCATION TOWARD AND AWAY FROM THE ONE ROLLER AND BEING SPRING URGED TOWARD THE ONE ROLLER, AN ELECTROMAGNET ACTING ON SAID OTHER ROLLER FOR MOVING THE OTHER ROLLER AWAY FROM THE SAID ONE ROLLER, A SWITCH IN THE CIRCUIT FOR SAID ELECTROMAGNET, CAM MEANS IN SAID DRIVING MEANS FOR CLOSING AND OPENING SAID SWITCH FOR ENERGIZING AND DEENERGIZING SAID ELECTROMAGNET, SAID CAM MEANS CLOSING SAID SWITCH WHEN SAID ECCENTRIC IS OSCILLATING SAID ONE ROLLER IN A DIRECTION OPPOSITE THE FEEDING DIRECTION, SAID MACHINE FURTHER COMPRISING SECOND FEEDING MEANS ADJACENT SAID PUNCHING MEANS FOR FEEDING THE SHEET TO BE PUNCHED THROUGH SAID PUNCHING MEANS, SAID SECOND FEEDING MEANS COMPRISING A PLURALITY OF SHEET GRIPPING MEMBERS ALONG EACH EDGE OF THE PATH OF SAID SHEET, ELECTROMAGNET MEANS ACTING ON SAID SHEET GRIPPING MEMBERS FOR MOVING THEM INTO ENGAGEMENT WITH THE SHEET AND SPRING MEANS URGING THEM AWAY FROM SAID SHEET, SAID ELECTROMAGNET MEANS HAVING AN ENERGIZING CIRCUIT IN WHICH SAID SWITCH IS INCLUDED, AND SAID DRIVING MEANS DRIVING SAID PUNCHING MEANS WHILE SAID ELECTROMAGNET IS DEENERGIZED AND BEING CONNECTED TO SAID SHEET ENGAGING MEANS FOR RECIPROCATING SAID SHEET GRIPPING MEMBERS BACK AND FORTH ALONG THE FEED PATH SIMULTANEOUSLY AS SAID ECCENTRIC OSCILLATES SAID ONE ROLLER, AND CONVEYOR MEANS FOR CONVEYING AWAY THE PORTIONS OF SAID SHEET WHICH ARE PUNCHED FROM THE REMAINDER OF SAID SHEET. 